摘要
目的研究由螺栓连接的装配式混凝土梁柱节点的抗震性能,基于试验结果提出一种针对此类节点的恢复力模型骨架曲线,为此类节点的工程实践提供试验依据,也为此类节点的弹塑性反应分析提供参考。方法对两个由8.8级和5.6级不同等级螺栓连接的装配式混凝土梁柱节点进行拟静力试验,以不同螺栓等级为变化参数,研究分析两节点的破坏模式、滞回性能、承载力退化、刚度退化以及延性性能、耗能能力等抗震性能,并对荷载-位移试验散点数据拟合,建立一种针对此类节点的恢复力模型骨架曲线。结果两试件在低周反复荷载作用下均出现梁端弯曲破坏;滞回曲线饱满,有明显的捏缩段;承载力、刚度退化缓慢,抗侧移能力较强;由于5.6级螺栓参与工作,5.6级螺栓连接的节点延性性能、耗能能力略微高于8.8级螺栓连接节点;所建立的恢复力模型骨架曲线与试验值较为吻合。结论基于螺栓连接的装配式混凝土梁柱节点抗震性能良好,可以用于装配式框架结构体系,建立的恢复力模型骨架曲线也可作为螺栓连接节点的弹塑性反应分析计算模型。
Seismic performance of bolt-connected prefabricated concrete beam-column joints were experimentally studied.A skeleton curve of the restoring force model is proposed which can provide references for the analysis and calculation of elastoplastic analysis response.A Pseudo-test was carried out,using two kinds of specimens with bolt connection grades of 8.8 and 5.6 respectively,to analyze the seismic resistance performance of beam-column joints,including failure modes,hysteretic performance,bearing capacity degradation,stiffness degradation,ductility performance and energy dissipation capacity.The scatter diagram of load-displacement test was fitted and a skeleton curve of the restoring force model concerning this kind of joints was proposed.During the test,both specimens developed bending failures at the beam ends under low-cycled reversed loading.The hysteretic curves of both specimens are plump and obviously with pinching sections.The bearing capacity and the stiffness degrade slowly,showing its great resistance to lateral movement.Owing to the contribution of 5.6-grade bolt elastoplastic section,the ductility performance and energy consumption of the 5.6-grade bolt connection are slightly higher than that of 8.8-grade.Test results show that:the bolt-connected prefabricated concrete beam-column joints have good seismic performance,and can be used in prefabricated frame structure systems;the established skeleton curve of the restoring force model simulates the test value well,which can provide references for the analysis and calculation of elastoplastic response analysis of this kind of joints.
作者
丁克伟
陈伟
DING Kewei;CHEN Wei(School of Civil Engineering,Anhui Jianzhu University,Hefei,China,230601)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第1期51-60,共10页
Journal of Shenyang Jianzhu University：Natural Science
基金
“十三五”国家重点研发计划重点专项资助项目(2016YFC0701500)
国家自然科学基金项目(11472005)。
关键词
装配式混凝土梁柱节点
拟静力试验
抗震性能
恢复力模型
prefabricated concrete beam-column joints
pseudo-static test
seismic performance
restoring force model
